Number of bracelet structures using a maximum of six different colored beads.

A056356

Number of bracelet structures using a maximum of six different colored beads.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =3a(4) =7a(5) =12a(6) =37a(7) =92a(8) =349a(9) =1308a(10) =5953a(11) =28228a(12) =144587a(13) =760110a(14) =4112548a(15) =22571040a(16) =125410355a(17) =702370208a(18) =3959139804a(19) =22425417824a(20) =127530813841a(21) =727630240536

External references